Manitowoc 2250 Service Maintenance Manual

Reference Only
TROUBLESHOOTING 2250 SERVICE/MAINTENANCE MANUAL
10-54
Published 07-19-16, Control # 249-01
Test 20—Checking Voltage at the Speed Encoders
Testing the boom hoist or load drum speed encoder (1) for
correct voltages requires a standard test plug adapter (2)
(can be ordered from Manitowoc Cranes) and a digital
multimeter.
To test incoming power at the desired speed encoder,
perform the following procedure.
1. Make sure the engine is off and power is on, with all
brakes and locks engaged.
2. Disconnect the output cable from the speed encoder
connector.
3. Install the test plug adapter to the encoder.
4. Connect the test plug adapter red (positive) and black
(negative) to the digital multimeter jacks.
5. Start the engine with all brakes and locks engaged.
The motor or drum should remain at rest.
6. Check for 12 volts DC.
7. If this reading is not obtained, check the 5 amp F11 fuse
at the fuse panel (see Test 11—Testing for Voltage at the
Fuse Box).
To test voltage output from the speed encoder to the PC,
perform the following procedure.
1. Make sure the engine is off and power is on, with all
brakes and locks engaged.
2. Connect the green (positive) and black (negative) wires
to the digital multimeter jacks.
3. Check for 0.00 or 7.40 volts DC with the motor or load
drum at rest.
4. With the motor or load drum enabled, check for 3.5 to
3.9 volts DC.
5. If these readings are not obtained, check the encoder
drive assembly and wiring.
P1528 P1529
Load Drum Main Hoist Motor
1
2
3
1
2
3
FIGURE 10-23
Item Description
1 Encoder
2 Test Plug Adapter
3 Adapter Cable Connections

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English